Whenever someone says, “I don’t have time”, what they’re really saying is this isn’t important enough for them.
If it were important enough, they would make time for it. They would try to fit it somewhere in their schedule. Since they didn’t do any of that, it’s not important enough for them.
This holds for yourself too. You will only spend time on what’s important for you. If something more important comes up, you won’t say “I don’t have time”, instead you will re- prioritize and make time for what’s more important.
People have plenty of time, if it’s important enough for them.